The National Banking Acts of 1863 and 1864 were two United States federal banking acts that established a system of national banks, and created the United States National Banking System. They encouraged development of a national currency backed by bank holdings of U.S. Treasury securities and established the Office of the Comptroller of the Currency as part of the United States Department of the Treasury and a system of nationally chartered banks. The Act shaped today's national banking system and its support of a uniform U.S. banking policy.

The Office of the Comptroller of the Currency (OCC) is an independent bureau within the United States Department of the Treasury that was established by the National Currency Act of 1863 and serves to charter, regulate, and supervise all national banks and thrift institutions and the federally licensed branches and agencies of foreign banks in the United States. The acting Comptroller of the Currency is Michael J. Hsu, who took office on May 10, 2021.